Trajectory Tracking Control of an Unmanned Aerial Vehicle (UAV) Using Fractional Order Sliding-Mode Control

Abstract

The UAVs have a nonlinear structure and a high performance controller design is required to control such systems. Robust controllers are needed when considering system dynamics and structural and non-structural constraints for four-rotor quadrotor control. For this purpose, the design of the Fractional Order Sliding Mode Controller (FOSMC) has been considered. The nonlinear system is considered as two linear subsystems connected in cascade as inner loop (position control) and outer loop (position control). A virtual control term is used to connect the system to the cascade structure. A well-tuned PI controller was applied to the UAV for the same trajectorys to compare the performance of the designed FOSMC. The simulation results show that the FOSMC is performing satisfactorily in terms of error elimination when compared to the PI controller.

Keywords

• UAV,Quadrotor,Fractional Sliding Mode Controller

İnsansız Hava Aracının (İHA) Kesir Dereceli Kayan Kipli Kontrolcü ile Yörünge Kontrolü

Abstract

İnsansız Hava Araçları (İHA) doğrusal olmayan yapıya sahiptir ve bu tip sistemlerin kontrolü için yüksek performanslı kontrolcü tasarımı gerekmektedir. Dört rotorlu quadrotorun kontrolü için sistem dinamikleri, yapısal ve yapısal olmayan kısıtlar da göz önüne alındığında gürbüz kontrolörlere ihtiyaç duyulmaktadır. Bu amaçla dört rotorlu İHA’nın yörünge kontrolü için bir Kesir Dereceli Kayan Kipli Kontrolcü (KDKKK) tasarımı önerilmiştir. Doğrusal olmayan sistem iç döngü (duruş kontrolü) ve dış döngü (konum kontrolü) olarak kaskad yapıda bağlı iki doğrusal alt sistem halinde ele alınmıştır. Hava aracının duruş ve konum kontrol yapısını kaskad olarak birleştirmek için bir ara kontrol işareti tanımlanmıştır. Tasarlanan KDKKK’nün performansını kıyaslamak için parametreleri iyi ayarlanmış bir PI kontrolcü aynı yörüngeler için İHA’ya uygulanmıştır. Benzetim sonuçları, KDKKK'nün PI denetleyiciyle karşılaştırıldığında hata giderme açısından tatmin edici performans gösterdiğini göstermektedir.

Keywords

• İHA,Quadrotor,Kesir dereceli kayan kipli kontrolcü

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